diff --git a/.pam_environment b/.pam_environment
index 4ef8182..afa7ce5 100644
--- a/.pam_environment
+++ b/.pam_environment
@@ -46,6 +46,8 @@ IPYTHONDIR		DEFAULT=${XDG_CONFIG_HOME}/jupyter
 JUPYTER_CONFIG_DIR	DEFAULT=${XDG_CONFIG_HOME}/jupyter
 # pylint
 PYLINTHOME		DEFAULT=${XDG_CACHE_HOME}/pylint
+# mypy
+MYPY_CACHE_DIR		DEFAULT=${XDG_CACHE_HOME}/mypy
 
 # npm
 NPM_CONFIG_USERCONFIG	DEFAULT=${XDG_CONFIG_HOME}/npm/npmrc